Device for grinding cylindrical rotating boies by means of a plane grinding-tool.



C. BLECHER DEVICE FOR GRINDING CYEINDRICAL ROTATING BODIES BY MEANS OEA PLANE GRINDING TOOL.

E ywPLlizATloN met) Dic. 4. 1914'.

I m2083782- Patented B60121916.

Eg jig j y ,ai i 6 f' u w ala-g y M l in the grinding surface. ci' -tire tooi.

'cadran sumas PATENT OFFICE.

(EARL LECHER, GIF BERLIN-DAHLEM, GERMANY, ASSIGNOR TG ROTOIPIJIOT AKT. GES., FR @RPISCHE INDUSTRIE, 0F BERLIN, GERMANY.

DEVICE FR GRNDIl-ING CYLINDBCAL ROTATING BODIES BY MEANS OF A-PLANE @BINDING-TOOL.

Specicaton of Letters Patent.

Patented Dec. 12, 1916.

Application lcd December 4, 1914. Serial No. 875,549.

To cli vwhom it may concern .lic it known that l., Cam. BLECHER, sub.- l,ect of the King of Prussia, residing at liHiedbcrgstmsse 23, Berlin Dahlem, Germany, have invented-certain new and usct'ul finprcvcments in Icvicee for Grinding ylindrical Rotating Bodies 'o' Means of a 'Hanc- Grndingffccl, of Wiiici the following io a specification.,

My im ntion relates to devices for grind ing cyiindricai rotating bodies by means of a plane grindin tool.

The 'object o my invention is to provide a dci/ica of this kind which will grind or pciish cylindrical bodies of stone, plastic masses, Wood5 metai or @ny other suitabley niatcriai by means of e inane grinding tool which in revolving and at' the same time rbtating around its geometrical axis at a sfow pace causes ail parts of its grinding surface, one after the other, to corno in contact with thc bcdy to be groundin order to obtain a uniform grinding action and to avoid an. irregiiiar weer andthe formation of grooves According to my invention the. grinding tool has donbic motion, it being revolved by being ccccntrically connected with a rotating shaft and being further caused to ro tate about its own axis by means of a worm gcc?.

The drawings'at'dxcd to this specification show a preferred 'form of a device'accord ing to my invsntion, Figure l being a vertical section, Fig. 2 a 'pl-:xn NicWVFig. 3 another verticai section through thc device.

The grinding tooi c. rcposing cn'the. c din dier foto be ground is 'fastened to a soc Cet having a Worm Wheel a arranged on its jour nal 52. The compositi; bead of tbe socket b embraces a disk c being 'ccccntrically fixed on the driving shaft df. The ioWer part of journal b2 is embraced by a rectangular frame r forming. slot and crank, the journal carrying a sliding block t gliding in the freine. Frame o" is "free to osciiiatc around .verticalstandard r, an arm r' and eye r2 connecting it with said standard. A worm u located 1n bearings u arranged on the side of frame f is driven by means of a jointed coupling e with universal joints inserted.

The driving shaft d in rotating in one direction causes socket b by means of the c`ccentric disk c to revolve around the axis o shaft af. This causes the block t embracing journal b2 to reciprocate in slot r and to impart reciprocating movements to the worm wheel 8, these movements following a line parallel to the worm u and causin' a rollmg motion to take place between t e worm and thev worm wheel. The worm being slowly turned at the same time, there rcsults a gradual rotation of the grinding tool around its geometrical axis-,and all the points' 'ofthe tool are mades to Work, one after the othcr, so that a umform wear results.

I claimz--- 1. In a device for grinding cylindrical rotatin bodies by means of a plane tool, in

combination, a grinding tool, a driving shaft forsaid toolmeans for revolving said tool around an eccentric axis and means for imparting to said -tool a non-uniform rotary motion..

2. In a device for grinding cylindrical ro- .tatin bodies by means of a plane tool, in combination, a grinding tool, a. driving shaft .for said tool, an eccentric connecting `said grinding tool with said driving shaft, a

worm gear adapted to rotatesaid grinding" tool varound its own axis and a slot and cran device interposed between sind tool and said .accenti-ic, said slot and crank device belng adapted to oscillatcaround a fixed and carrying the worm forming parto worm gear.

In testimon f whereof I aiiiximy, signatur# 1n presence o two wltncsses. l

CARL BLECHER.

Witnesses:

. WoLnEMAn HAUPT,

HENRY Hasrnn.

aus 

